Future Fins

Just got a new board with a future fin set up. i have never had future fins before, so i was hoping for some advice. mainly i surf small mushy surf. i have some basic fins now but i want some fins for when it get in better surf. im more of a rail to rail surfer with somewhat of a heavy foot. any advice would be much appreciated. thanks

i have futures on my 5'11" x 19.25" im about 145 lbs...i love my vector 3/2 with the hatchet trailer...fast and loose...ive been on them in 3ft mush all the way to 2 x overhead